Authenticate users using google in Unity and Firebase with OAuth2.0

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If you have already tried Google Authentication in ‪@unity‬ and ‪@Firebase‬ you know the pain. In this tutorial, I show you how you can let your users authenticate with Firebase using their Google Accounts with the help of OAuth2.0. This method works for both iOS and Android.
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[@MarllonVilano]

I came from Unity Forum, thanks a lot for that tutorial. That is exactly what I was trying to achieve some months ago with the Built-in Unity solution (which is abandoned by the developers).

[@JoystickLab]

Glad to help. I was in a same situation so had to find this solution hard way 🙂.

[@akakoakako]

something is not clear here with the redirect URI. im getting an error at the original test. im not developing for IOS but andoird but still it should work right?

[@vamseeeesmav459]

Hey, thanks for this. Do you any info that you could share on how to connect the google sign in with Unity's UGS using the OpenID?

[@JoystickLab]

It should be the same, just get the token using the same process and then pass that to the UGS google sign in.

[@doublehitgames531]

Hey i came from Unity Forum too, first for all, ty for this. So a have a doubt could you gime some light? Can i use this way to google Sign and acesss the Unity Liveops services too? Basicaly i need to use a Google Sign to connect my user to Unity LiveOPS services like Cloud Save.

[@JoystickLab]

Thanks for coming here 🙂. I haven’t personally tried UGS , but it should be possible. You just need to generate token with the tutorial and then pass it to the UGS system, like the documentation says docs.unity.com/ugs/en-us/manual/authentication/manual/platform-signin-google#Sign_in_a_returning_player_or_create_new_player

[@aashishsharma2692]

Hello I am getting error with Editor and with IOS as well, in Editor I am getting this error "You can't sign in to this app because it doesn't comply with Google's OAuth 2.0 policy for keeping apps secure.", I followed the same steps but its not working, and for IOS I was able to continue with login but after clicking Continue I am getting error "Safari can't open the application" I am using the same Bundle Identifier with ":/". Please help

[@JoystickLab]

I think you might have made some mistake on you GCP panel. Make sure in gcp you have the same approved url like the one used on your code. And for iOS the bundle identifier. 🤔

[@aashishsharma2692]

@@JoystickLab thanks for the reply for the editor I followed the same step as mentioned in video, and for IOS I used the bundle Id with ":/" but I am unable to open app as mentioned at start of the video I checked your video multiple times but no success :(

[@doublehitgames531]

@@aashishsharma2692 make sure that your app is published in GCP Auth concent screen. You need apply to publish it

[@dilyobsafarov6678]

"Error 400: redirect_uri_mismatch" - Why?? I did everything like you did?

[@JoystickLab]

Your redirect url in the code and gcp might be different

[@akakoakako]

@@JoystickLab im not sure if I understand im sorry, could you please elaborate?

[@akakoakako]

@@JoystickLab I mean in the tutorial you did not finally put anything there